I am sorry, the SG4D is a convection oven which does not have burner grates.

This grate fits the following Vulcan models:GHMCB34GHMCB51HGB34HGB34MHGB50HGB50MHGB60HGB60MHGB71HGB71M

If you are looking for a replacement oven rack, I have attached the correct rack below.https://www.etundra.com/restaurant-parts/cooking-equipment-parts/oven-shelves/commercial-28-one-quarter-inch-by-21-one-quarter-inch-oven-shelf/